| continuous passive motion | A technique in which a joint, usually the knee, is moved constantly in a mechanical splint to prevent stiffness and to increase the range of motion. (05 Mar 2000) |
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| specific passive immunity | See: acquired immunity. (05 Mar 2000) |
| natural passive immunity | Immunity conferred by the mother on the foetus or newborn. (14 Nov 1997) |
| immunization, passive | Transfer of immunity from immunised to non-immune host by administration of serum antibodies, or transplantation of lymphocytes (adoptive transfer). (12 Dec 1998) |
| euthanasia, passive | The withdrawing or withholding of extraordinary means used to prolong life. (12 Dec 1998) |